Feed-regulator for powdered fuel



I AuxjIia/y Air W. P. KEYSER AND I. A. MOORE. FEED REGULATOR FOR POWDERED FUEL.

Patented Aug. 23, 1921.

APPLICATION FILED IUNE I0 1919.

WILLIAM P. 1 KEYSER) AND JOHN REED-REGULATOR, FOR roWnE tED FUEL.

S Toa l l whom it may concern:

Be it known that we, WVILLIAM P. KEYsER and, JOHN A. MOORE, citizens of the United Statesof America, and residents of Richland district, county of Ohio, and State of'West Virginia, have invented certain new and useful Improvements in F eed-Regulators for Powdered Fuel, of which the following is a specification.

This invention relates broadly to'means for controlling the delivery of'air conveyed pulverized material, and more particularly to afeed control valve for powdered-coal feeding systems.

f Theprimary object of theinvention is-to provide, in associationwith ,a supply pipe or main conduit through which pulverized or powdered material is conveyed by the impelling force of an air blast, regulatable means whereby the quantity of material diverted from said main conduit to 'a branch line may be readily controlled.

A further object is to provide a regulating device or valve, "designed especially for use in systems for supplying finely comminuted coal, commonly termed coal dust, to furnaces, whereby the rate of feed of the fuel from the supply line or conduit to a j branch line or pipe leading to a furnace may 30 be accurately controlled.

A still further object is to provide a valve ofjthe' character mentioned which may be conveniently and instantly adjusted without in any way interrupting or disturbing the constancy of the flow of fuel through the main conduit.

With these and other objects in view, the invention resides in the features of-construction, arrangement of parts and combinations of elements which will hereinafter be fully described,reference being had to the accompanying drawings, in which- 7 F igure 1' is a central section of our invention;

Fig. 2 is aside elevation of the collector.

Fig. 3fis'a view showing the device. connected to a burner.

Referring to said drawin s, in which like designating characters distinguish like parts throughout the several views v 1 indicates a main conveyer pipe or conduit through which the powdered or commi'nuted fuel is conveyed in a constant Specification of Letters Patent. Application filed June 10, 1919. Serial No. 303,074.

atented Aug. 23, 1921.

stream, as ordinarily, by the force of an air current or blast from the suitably located fan or blower. Mountedon said conduit at the pointfrom which it' is desired to lead fuel for feeding a furnace is the device which constitutes the present invention, the same including a saddle member 2 which is suitably supported against the underside of said conduit, as by means of a band or bands 3. Said saddle 2 has therein acentrally disposedopening 5 in register with an opening 4 provided in the under side of the conduit. Attached to said saddle is then per end of a valve casing 6 having therein a conical seat 7 in which is disposed a rotary cone valve 8. Said valve has therein a central vertical bore or socket" 9 which registers at its upper, end with the openings 4 and 5. Leading laterally outward from saidsocket 9 through the wall of said valve 8 is a passage or port'lOwhich is adapted to be carried by rota'tioniofthe valve into and out of register with a side 0 ening or passage 11 in" the valve casing. aid passage 11 is designed to be disposed in open communication with a branch line or pipe (not shown) leading to-a furnace. I

Fitted closely in the socket 9 is a vertically disposed adjustable tube 12 the upper end of which protrudes through the openings 4 and 5 into the interior of the conduit 1. Said tube has its lower end mounted upon A. Moons, OF RICYHLANDVDISTRICT, WEST VIRGINIA.

a piston-like plunger 13 carried upon the upper end of a stem 14'which isvertically movable through the lower end of the valve 8.' A portion "of one side of the upper end of said tube is cut away, as is best shown in Fig. 2, and the remaining approximately semi-cylindrical portion 12 constitutes a ba e against the internal face ofwhich coal dust passing through the conduit impinges and thence dropsdownward into the interior of said tube. Said tube longitudinally extending port 15 which is so located and which has such a length that a portion thereof registers with the port 10 in the valve 8 at all times irrespective of the extent of elevation of said tube. v

In practice, the tube 12, which functions as a collector of the pulverized fuel, is adjusted vertically for disposing its upper, or receiving, end at a greater or less elevation has'in one side thereof a v within the conduit of feed of the fuel.

1 for controlling the rate It being understood that the lower stratum of powdered fuel passing through the conduit 1 is quite dense and "that the density "decreases rapidly from the lower to the upper stratum, it is obvious that the mouth of the collector'tube'may be disposed by adjustment to receive fuelfrom Y strata of any desired density and that, conin the valve casing 6. r

' Since the baffle 12? directing the same sequently, the rate of feed offuel to the furnace may be more or lated or controlled. Further regulation may be effected by rotating the-valve 8 todispose moreorless of the cross sectional area'of its port 10 in register with the passage 11 has a transverse dis- -While any preferred-means may be pro 7 vided whereby adjustment of the valve and we have herein shown,

-- The stem 14 which carries at fixed points, as upon of the collector tube may be accomplished,

for illustrative purposes; only, avertical tube 16 having its uppger'end fixed tothe lower end of the valve 8.

otation ,imparted'to thisj tube will obvious'lybe directlycommunicated to the valve. the plunger 13 extendsdownward through the interior of and projects outward from the lower end of said tube 16 and has fixed on its end a crosshead 17 Two oppositely disposed levers 18 have their inner ends pivotally mounted lugs 19 carried by a nipple 20 which is threaded uponthe lower end of said tube 16. Links 21 pivoted at their lower ends upon the opposite ends of the cross-head 17, have their upper ends pivoted to said levers 18 intermediate the ends of the latter. As is obvious, force ap plied to the outer ends of said levers, or eitherof them, will effect, through the intermediate mecha-nism described, shifting movement of the collector tube, the direction of movement being dependent upon whether the vforce applied to said levers is directed upwardly or downwardly. As is apparent, said levers may also be employed for effecting rotation of the valve 8.

Manifestly, the present invention is admirably adapted for use in regulating or controlling the feed of fuel in those systems in which the compressed air carrying the fuel is supplied at a constant or uniform veless accurately regufull registering IGlittlOl'l,

'locity. In other-words, thejinvention furnishes a simple and efiicient means of control which obviates the necessity forvarying the volume of air and which consequently, eliminates those objections'which arise from reductions in the volume and velocity of the air below a certain limit, chief among which may be mentioned that the fuel is permitted to collect or pile up, clogging thepassages'.

What is claimed is- 1. A feed regulator for powdered fuel,

comprising a supply'conduit for conveying the air and powdered fuel, said conduit having an opening in the under side thereof, a valve casing attached to, said conduitand having a cone seat therein, a cone valve ro tatable on said seat, a central socket in said valve disposed in register with the opening in the conduit, a tubular member fitted in said socket with itsupper end extending into the interior of said conduit for inter cepting and conducting downward some of the fuel, and meansforadjusting the eleva disposingthe re-- tion of said member for ceiving end of the latter atvarious levels within said conduit, said member and said valve having registering ports, and said valve casing having 'a discharge passage with which said ports are adapted to reg ister. V

2. A feed regulator forpowdered fuel, comprising a supply conduit for conveying, the air and powdered ing an opening in the underside thereof, a valve casing attached to having a cone seat therein, a cone valve rotatable von said seat, acentral socket in said valve disposed in register in the conduit, aftubular member fitted in fuel, saidconduithav-i 7 said conduit and c with the opening said socket withits upper end extending into the interior of said conduit, saidup'per end of said member having means for intercepting and deflecting "fuel downward into the interior of said member, means foradjusting the elevation of. said member, said member and said valve and said casing having ports or passages therein, and means for relatively adjusting saidelements to dispose said ports or passages in register for discharging the fuel collected by said member,

3. A fuelregulator for powderedfuel, comprising a supply conduit forv conveying the air and powdered fuel, said conduit-having an opening in the under side. thereof, a valve casing attached to said conduit and having a cone seat therein,a cone valve rotatable on said seat, a central socket in said valve disposed in registerwith the opening in the conduit, a tubular meinberfitted in said socket. withits upper, end extending into the interior of said conduit, said upper the interior of said member, means for adjusting the elevation of said member, whereby its said deflecting means may be dis posed at various levels Within said conduit,

said valve casing having a side-opening discharge passage therein, and said valve and said member having registering ports adapted to be disposed in register With said passage, and means for rotating said valve.

In testimony whereof We afiix our signatures H1 presence of two witnesses.

WILLIAM P. KEYSER. JOHN A. MOORE. Witnesses:

JOSEPH H. LUCAS, i GEO. E. SHIEROFF. 

